Talking machine employing large diaphragm



L. LUMIERE Oct. 30, 1928. I 1,689,286

TALKING MACHINE EMPLOYING LARGE DIAPHRAGM Filed Nm r. 4, 1924 '2Sheets-Sheet 1 Oct. 30, 1928. 1,689,286

L. LUMIERE TALKING MACHINE EMPLOYING LARGE DIAPHRAGM Filed Nov. 4, 19242 Sheets-Sheet 2 Patented Oct. 30, 1928.

UNITED STATES 1,689,286 PATENT OFFICE.

LOUIS LUMIERE, OFLYON, FRANCE.

TALKING MACHINE EMPLOYING LARGE DIAPHRAGM.

Application filed November 4, 1924, Serial N0. 747, 860, and in FranceNovember 28, 1923.

This invention relates to improvements in talking machines employinglarge diaphragms. In my application for patent Serial No. 744,036, filedin the United States October 16, 1924, and filed in France November 16,1923, entitled Talking machines employing large diaphragms, I havedescribed a method of mounting the diaphragm of talking machinesemploying large diaphragms, so that it can occupy substantially avertical position, at right anglesv to the record, durmg playing, whilewhen not in use it may be ar ranged to lie horizontally substantiallyparallel with the diaphragm, so that the lid of the 1' talking machinecasing may be closed.

The present invention relates to alternative means for carrying out theinvention which forms the subject of the above mentioned application.

According to thepresent invention a carry ing arm is pivoted to a fixedpoint, for example on the cabinet of the machine, and upon the end ofthis arm the diaphragm is mounted with a double articulation.

The invention is illustrated in the accompanying drawings, in whichFig.1 is an elevation showing the diaphragm in the playing position, i

Fig. 2 is a plan view of the same, while Figs. 3 and 4 are respectivelyelevation and plan views of the diaphragm in the non-playing position.

Figs. 5 and 6 illustrate the details of construction on a larger scale,Fig. 5Jbeing a side tween two metal rings, or in a single metal rim(Figs. 5 and 6) the edges of which are bent over and clamped on the.edge of the diaphragm, so as to forma rigid ring 7*. On one face of thering r is fixed a star shaped support, by 'means of its radiating armsa, which meet at the middle in a boss 0' (Fig. 4.) On the inner face ofthis boss is mounted so as to oscillate, a bell crank, not shown in thedraw-' ing, and one arm of this bell crank is connected to the diaphragmcl while the other is connected to a transmission member y which in turnis connected to the oscillating needle tion is that the diaphragm d ismounted at one part of its circumference upon the free end of ahorizontal arm 1), the other end of which is mounted to turn about avertical axis f, with a ball hearing if desired, which is fixed at asuitable point upon the top board 2' of the case of the machine, Figs. 1to 4.

The diaphragm is mounted upon this carrying arm 72 with a doublearticulation, as will be seenfrom the drawing, Figs. 5 and 6. On theopposite sidesof the ring r to that which carries the star shapedsupport 0, c, a cross bar It is fixed by means of screws or bolts, thebar at extending across between the ends of two of the arms 0, between'iwhich is mounted tlie needle holder, carryingjthe needle .12. On theouter face of this crossbar t is fixed a stub shaft 0 perpendicular tothe plane of the cross bar and of the diaphragm and situated between thetransmission member 3 and the rear end of the cross bar at (Fig.5).

The diaphragm d is able to rock onthe'free end p of the arm p by meansofthe stub shaft 0 which turns freely in an eye formed in a lug m on asleeve m which is mounted to turn on the end 9 of the arm p. The sleevem lies at right angles to the lug m and the stub shaft 0. In Figs. 5 and6, it will be seen that the end 19 of the arm p is reduced in diameterand that the sleeve m is held thereon by means of a Washer s and a screw1). While one type of means has been illustrated for mounting sleeve mit is to be expressly understood that the invention is not limited tothe particular embodiment illustrated. The vertical shaft f about whichthe arm p turns is mounted at a convenient point on the board 71 withregard to the record disc D, Fig. 2, in order that the plane ofthediaphragm in the playing position may be able to turn through an angle,between the limits generally accepted in relation to a tangent to thesound groove at the point of contact of the needle :0 with the disc D.

The point at which the stub shaft 0 is mounted on the cross bar it, andconsequently the position of the diaphragm, is selected ac-' cording tothe weight of the latter, in order that the pressure of the needle onthe disc is within the limits permissible. This point 0- may not liewithin the circle of the diaphragm as will be readily understood bythose skilled in the art.

The pressure of the needle 00 upon the disc D may also be regulated bymeans heretofore employed in the art for this purpose.

The arrangement described allows the diaphra 1n d either to occupy avertical position, for p aying, as shown in Figs. 1 and 2, or to occupya horizontal position, as shown in Figs. 3 and 4, when the machine isnot in use. The latter position is obtained by causing the diaphragm tooscillate first of all about the stub shaft 0, so as to raise thediaphragm from the disc record, and then folding the diaphragm down byturning the sleeve m about the end of the arm 1).

The plane of the diaphragm may be parallel to that of the arm p or itmay form with it any desired angle, without any departure from thepresent invention.

The form of the carrying arm 1) may be varied, as also the manner inwhich it is mounted.

I claim:

1. In combination with a casing, a horizontally swinging arm pivoted tosaid casing, a diaphragm adapted to occupy a substantially verticalplaying position, a peripheral mounting for said diaphragm, and meansincluding a pivot member secured to the mounting adjacent the peripherythereof for securing the mounting to said arm, said means permittingmovement of the diaphragm about said arm in two planes.

2. In combination with a casing, a horizontally swinging arm pivoted tosaid casing, a diaphragm'adapted to occupy a substantially verticalplaying position, and pivotal means for securing the diaphragm to saidarm, and permitting movement of the diaphragm in its own plane and alsoin a plane at right angles thereto, the major portion of said diaphragmbeing located above said arm when the diaphragm is in playing position.

3. In combination with a casing, a solid arm mounted'for pivotalmovement in a horizontal plane on the casing, a diaphragm adapted tooccupy a substantially vertical playing position and a substantiallyhorizontal non-playing position, and means including a horizontallydisposed pivot member secured to the arm above the latter for attachingthe diaphragm to said arm.

1. A. mounting tor a diaphragm comprising, in combination with a casing,a horizontally swinging arm pivotally secured to said casing, adiaphragm, and means for pivotally securing said diaphragm to said armineluding a pivot member eccentrieally secured to, said diaphragm, saidmeans permitting pivotal movement of the diaphragm about two axes atright angles to one another.

5. A mounting for a diaphragm comprising, in combination with a casing,a horizontally swinging arm pivoted to said casing, a diaphragm adaptedto occupy a substantially vertical playing position, a peripheralmounting for said diaphragm, and means including a pivot member securedto the lower portion of said mounting for securing the mounting to saidarm. I

6. A mounting for a diaphragm comprising, in combination with a casing,a diaphragm adapted to occupy a substantially vertical playing position,a peripheral mounting for said diaphragm, a horizontally swinging armpivoted to said casing, said arm being approximately tangent to thelower edge of said diaphragm, and means including a pivotmember securedto the lower portion of said mounting for securing said mounting-to saidarm.

7. In combination with a casing, a horizon tally swinging arm pivoted tosaid casing, a diaphragm adapted to occupy asubstantially verticalplaying position and a horizontal non-playing position, a stylus forsaid diaphragm, and means'pivotally connected to the diaphragm, adjacentthe lower edge of the same when the latter is in playing position, andpivotally secured to said arm for adjustably mounting said diaphragm onthe arm.

8. A mounting for large diaphragms comprising, in combination with acasing, a horizontally swinging arm mounted on the easing, a sleeverotatably mounted on the free end of said arm, said sleeve beingprovided with an opening therethrough, the longitudinal axis of which isdisposed at substantial- 1y right angles to the longitudinal axis ofsaid arm, a diaphragm, a frame secured to said diaphragm, and a pivotmember secured to said frame and ositioned in said opening.

9. A mounting or large diaphragms comprising, in combination with acasing, a diaphragm, a substantially rigid peripheral frame for saiddiaphragm, a supporting bar extending across the lower portion of saiddiaphragm and secured to said frame, a shaft extending from said bar atright angles to said diaphragm, a horizontally swinging arm mounted onsaid casing, a sleeve rotatably mounted on said arm, and a lug on saidsleeve forming a bearing for said shaft, the longitudinal axis of whichis disposed at substantially right angles to the longitudinal axis ofsaid arm.

